Statistical inference, Basic Statistics

A study was conducted at a major north-eastern American medical centre regarding blood cholesterol levels and heart-attack incidents. A total of 28 heart-attack patients had their cholesterol levels measured two days and four days after the attack. The units of measurement are milligrams per decilitre (mg/dL). The data are given below.

2078_STATISTICAL INFERENCE.png

Investigate whether there is evidence that the mean cholesterol level two days after a heart attack is different from that four days after a heart attack.

1. State the model behind the appropriate t-test, and assess those assumptions for which suf?cient information has been provided. (You are given that your assessment will not reveal any problems with the model and that the t-test is appropriate.)

2. Clearly state the appropriate null hypothesis and carry out the t-test

3. If it is concluded that there is evidence of a difference between the mean cholesterol level two days after a heart attack and that four days after a heart attack, obtain a 95% con?dence interval for this difference. Explain in your own words how the con?dence interval should be interpreted.

Posted Date: 2/27/2013 7:14:31 AM | Location : United States







Related Discussions:- Statistical inference, Assignment Help, Ask Question on Statistical inference, Get Answer, Expert's Help, Statistical inference Discussions

Write discussion on Statistical inference
Your posts are moderated
Related Questions
Choose one of the following four problems depending on your area and interest. a. What explains why a particular political candidate wins and his/her opponent loses a tightly co

Your company operates a machine shop, and, having heard you had experience in statistics and design of experiments, consulted you for your opinion on an experiment they want to run

charlie removes the 12 face cards from a standard deck of cards then shuffles the face cards together on their own. He selects 2 cards from the pile. The probability that the first

Let f (?) be the production function associated with a single-output technology, and let Y be the production set. Show that Y satisfies constant returns to scale if and only if f (

prof. ya-lu-chan definitions statistices

Why is an increase in inventory shown as a negative amount? A rise in stock indicates that a company has purchased more goods than it has sold. Increasing stock requires a money

the monthly income( in tk''s)persons workingin afarmis as flows ,14870,14930,15020,14460,14750,14920,15720,15160,14680,14890 find average monthly income?

Momentum and Energy Statement 1: If there is a definite force there is a definite displacement, which means that work is done definitely by the force. And Statement 2: The wor

Generate 1000 samples for each of the following continuous random variables: (a). Exponential distribution with λ = 1.2 and λ = 2.1 (b). Normal distribution with μ = 3.1, σ